Brake



June 5, 1934. R. s. SANFORD 1,961,831

BRAKE Filed March 7. 1951 INVENTOR A 0 ZZ 5 & /?0 5. 54/VFOPD BY W I A TTORNEY Patented June 5, 1934 BRAKE Roy S. Sanford, South Bend, Ind., assignor to Bendix Brake Company, South Bend, 11111., a corporation of Illinois Application March 7, 1931, Serial No. 520,799

Claims. ((11.188-140) This invention relates to brakes and more parshaft 34 may be rocked to apply the brakes by a ticularly to brakes for motor vehicles. foot pedal lever 38 or hand lever 40 suitably suproadly the invention comprehends means for ported on the chassis, preferably on the transautomatically applying the brakes of a motor mission casing.

5 vehicle upon deceleration of the vehicle, caused The front wheel brakes 22 are independently by applying either a set of rear brakes or a transyet concomitantly operated through depending mission brake on the vehicle. levers 42 suitably secured to the operating shafts An object of the invention is to provide a simple 44 for the cams. As shown, the lever 42 is arcuate and effective brake for a motor vehicle operable and is provided upon its free ends with a mass 46 10 automatically upon deceleration of the vehicle. engaging a stop 48 on the backing plate when the Another object of the invention is to provide brake is in the off position. The levers 42 are means for effectively applying the brakes on the preferably semi-circular and are provided upon wheels of a motor vehicle uniformly and contheir free ends with aball. This providesaclearcomitantly upon deceleration of the vehicle, the ance for the axle supporting the wheel and asso- 15 application being in proportion to the deceleraciated brake. The lever is so secured to the cam tion of the vehicle. 32 that the axis of the cam and the axis of the A further object of the invention is to provide ball or mass 46 are in a perpendicular plane brakes for the front wheels of a motor vehicle through the axis of the brake structure, when the operable automatically upon deceleration of the brake is in the off position, so that movement of =20 vehicle with an applied force proportionate to the the mass actuates the cam to effectively engage deceleration and releasable in proportion to the the friction element 30 with the braking surface steering angle. of the drum.

Other objects of the invention will appear from Another embodiment of the invention is illusthe following description taken in connection with trated in Figure 3, wherein each wheel of the 25 the drawing, ,which forms a part of this specificavehicle is equipped with a brake-actuating means 30 tion, and in which: including 9. depending lever suitably secured to Figure 1 is a top plan view of a motor vehicle the operating cams 32 and weighted at its free chassis illustrating oneembodiment ofthe invenend. In this embodiment of the invention detion; celeration of the vehicle may be caused by a. 30 Figure 2 is a side elevation of the brake illustransmission brake 48, which may be of any contrating the invention as applied; and ventional type operable through a foot lever 50 Figure 3 is a top plan view of a motor vehicle mounted on a suitable support. chassis illustrating another embodiment of the In operation, deceleration of the motor vehicle invention. may be caused by either a conventional hook- 35 Referring to the drawing for more specific deup for the rear brakes or through a conventional tails of the invention, 10 represents the side rails transmission brake.

of a motor vehicle chassis frame connectedby In instances where deceleration of .the vehicle spaced cross-bars 12. The frame is supported on is caused by an application of brakes on the rear a front axle l4 and a rear axle 16 by conventional wheels, the brakes on the front wheels will be 40 springs, not shown, and positioned on the axles simultaneously and concomitantly applied in pro- 14 and 16 are front wheels 18 and rear wheels 20. portion to the deceleration of the vehicle and the The wheels 18 and 20 are equipped with front weight of the mass 46 on the lever 42: it is, of wheel brakes 22 and rear wheel brakes 24. As course, understood that the applied force is afshown, the brakes are of a conventionaltype infected to a greater or lesser degree by the steer- 45 'luding a backing plate 26 having associated thereing angle of the individual wheels. with a rotatable drum 28 suitably secured to the It is clear that could the steering wheels be wheel, and a friction element 30 on the backing turned through an angle of 90 degrees deceleraplate for cooperation with the braking surface of tion of the automobile would not be effective to the drum with an operating cam 32 between the move the lever 42 and the weight 46, the force 50 separable ends of the friction element. of momentum then acting perpendicularly to the In one embodiment of the invention the rear plane of movement of the lever. If the wheels brakes 24 are operated by aconventional hook-up are turned through a lesser angle the effect of including a cross-shaft 34 positioned for, rotation deceleration upon the lever and weight is deon the frame and suitably connected to-the opercreased according to the angle through which the ating cams through pull rods 36. As shown, the wheels have been turned. Thus it is clear that the applied force is affected by the steering angle of the individual wheels.

In the embodiment where deceleration of the vehicle is caused by an application of the transmission brake, the brakes on all of the wheels of the vehicle are simultaneously and concomitantly operated, the applied force depending upon the degree of deceleration of the vehicle, the weight of the mass on the respective operating levers and the steering angle of the individual wheels.

In both embodiments of the invention release of the brakes is effected through decrease in' momentum of the vehicle resulting in the swinging of the weights to their normal position. This is in proportion to the degree of deceleration and the steering angle of the respective wheels.

While preferred embodiments of the invention have been described, it is to be understood that these are given merely as examples of the underlying principles and since these may be incorporated in other specific mechanical structures, I do not intend to be limited by those shown except as such limitations are clearly imposed by the appended claims.

Having thus described the various features of the invention, what I claim as new and desire to secure by Letters Patent is:

1. A brake for a motor vehicle including foot pedal operated means for decelerating the vehicle and a separate means for applying brakes by deceleration of the vehicle.

2. A brake comprising a fixed support, a rotatable drum associated therewith, friction elements on the support for cooperation with the drum, an operating cam on the fixed support between separable ends of the friction elements, a lever secured to the operating cam and a mass on the free end of the lever.

3. A brake for a motor vehicle comprising friction elements, a cam for operating the elements, an operating lever connected to the cam and a mass on the free end of the lever movable upon deceleration of the vehicle to apply the friction elements.

4. A vehicle having driven-controlled rear brakes, and front brakes having self-contained applying means actuated by changes in vehicle movement due to operation of the rear brakes.

5. A vehicle having braking means without operating connections and including applying means at the brake actuated by deceleration of the vehicle.

6. A vehicle provided with wheels having brakes associated therewith, together with an automatic applying device for each of said brakes entirely arranged adjacent the corresponding'brake, together with driver-controlled means not connected to said brakes or said devices and controlling the operation of the brakes by said devices.

7. A vehicle provided with brakes, together with an automatic applying device for each of said brakes, together with driver-controlled means not connected to said brakes or said devices and 100 controlling the operation of the brakes by said devices.

8. A vehicle having deceleration-controlled braking means, and provided with means for preventing acceleration of the vehicle from affect- 105 ing the brakes.

9. A vehicle having swiveled steering wheels provided with brakes having applying means actuated by deceleration of the vehicle with a force which is a function of the steering angle of the 110 wheels.

10. A brake for a motor vehicle including means positioned within the wheel for applying the brake by deceleration of the vehicle.

ROY S. SANFORD. 

